/**
 * Copyright (c) 2014,Egret-Labs.org
 * All rights reserved.
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Egret-Labs.org nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY EGRET-LABS.ORG AND CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL EGRET-LABS.ORG AND CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
var egret;
(function (egret) {
    var gui;
    (function (gui) {
        /**
         * @class egret.gui.Power
         * @classdesc
         * Power 类通过使用多项式表达式定义缓动功能。
         * @extends egret.gui.EaseInOutBase
         */
        var Power = (function (_super) {
            __extends(Power, _super);
            /**
             * @param easeInFraction 在加速阶段中整个持续时间的部分，在 0.0 和 1.0 之间。
             * @param exponent 在缓动计算中使用的指数。exponent 属性的值越大，加速和减速的速率越快。
             * @method egret.gui.Power#constructor
             */
            function Power(easeInFraction, exponent) {
                if (easeInFraction === void 0) { easeInFraction = 0.5; }
                if (exponent === void 0) { exponent = 2; }
                _super.call(this, easeInFraction);
                this.exponent = exponent;
            }
            var __egretProto__ = Power.prototype;
            Object.defineProperty(__egretProto__, "exponent", {
                /**
                 * 在缓动计算中使用的指数。exponent 属性的值越大，加速和减速的速率越快。
                 */
                get: function () {
                    return this._exponent;
                },
                set: function (value) {
                    this._exponent = value;
                },
                enumerable: true,
                configurable: true
            });
            /**
             * @inheritDoc
             */
            __egretProto__._easeIn = function (fraction) {
                return Math.pow(fraction, this._exponent);
            };
            /**
             * @inheritDoc
             */
            __egretProto__._easeOut = function (fraction) {
                return 1 - Math.pow((1 - fraction), this._exponent);
            };
            return Power;
        })(gui.EaseInOutBase);
        gui.Power = Power;
        Power.prototype.__class__ = "egret.gui.Power";
    })(gui = egret.gui || (egret.gui = {}));
})(egret || (egret = {}));
